Fears of a possible collapse at a condo tower under construction near Grand Central Terminal had abated by the end of the week, but the incident only signals the massive engineering challenges tied to Manhattan's office-to-apartment conversion boom.
The former Pfizer headquarters at 235 East 42nd Street, being converted by David Werner and Nathan Berman's Metro Loft Management into more than 1,600 residential units, has become a high-profile example of the risks of repurposing aging office towers into housing at scale to achieve socialist NYC Mayor Zohran Mamdani's strategy to address the metro area's housing shortage.
Engineer: “The concrete beams in our residential conversion of the Pfizer Building are buckling. The building could collapse! Did you correctly account for the weight of the additional floors we added?”
— tedfrank (@tedfrank) July 8, 2026
ChatGPT: “You’re absolutely right! I see the issue now—in using the Euler… pic.twitter.com/Wh3pABw84f
Metro Loft CEO Nathan Berman told Bloomberg in an interview that 15 stories were added to part of the building, and that two columns beneath were insufficiently reinforced, leading to a failure that caused some of the 15 cantilevered floors above to sag.
Via Bloomberg
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